Display panel or portion thereof with graphical user interface



The sole FIGURE is a front view of a display panel or portion thereof with graphical user interface, showing the new design.

The dot-dash broken line showing of a mobile device and the display screen form no part of the claimed design. The remaining broken lines illustrate portions of the graphical user interface that form no part of the claimed design. 

CLAIM The ornamental design for a display panel or portion thereof with graphical user interface, as shown. 